10 A Bulletin on Orchard Practice 



Lead arsenate sticks well and shows up well on the apple. 

 An ordinary rain will not wash it off. It can not scorch. It 

 has given such good results that it is the cheapest insecticide 

 in the long run. 



If lead arsenate can not be obtained use one pound of 

 Paris green to 125 gallons of water. Add the Paris green 

 to two pounds (no more) of freshly slaked lime in mixing. 

 Keep this mixture constantly agitated while spraying. 



HOW TO SPRAY. 



Be thorough. One spraying properly done is better than 

 a dozen incomplete sprayings. Every side of every apple 



CODLING MOTH LARVA. 



must be sprayed. If an apple is only partly covered it will 

 probably become wormy. Use as much force as possible; the 

 mixture will penetrate hotter, spread better, and stick better. 

 The one object of the ,$rst spraying is to get poison into the 

 calyx cup. To do this it is necessary to force the spray 

 through the crown of stamens. Spray downwards into the 

 flowers with all the force possible until the flowers are drip- 

 ping. An angle at the end of the extension rod is a conveni- 

 ence. The other sprayings must be made crosswise and up- 

 wards, as the aim is to coat the fruit with poison. Use what- 

 ever nozzle will break up the spray into a mist with the pres- 

 sure available, Vermorel for hand pumps and the Bordeaux 



